FKIE_CVE-2026-34209

Vulnerability from fkie_nvd - Published: 2026-03-31 15:16 - Updated: 2026-07-24 21:10
Severity
7.5 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
Summary
mppx is a TypeScript interface for machine payments protocol. Prior to version 0.4.11, the tempo/session cooperative close handler validated the close voucher amount using "<" instead of "<=" against the on-chain settled amount. An attacker could submit a close voucher exactly equal to the settled amount, which would be accepted without committing any new funds, effectively closing or griefing the channel for free. This issue has been patched in version 0.4.11.
References
security-advisories@github.comhttps://github.com/wevm/mppx/commit/94088246ee18f21b5d6be40d9e7a464f5a280bfbPatch
security-advisories@github.comhttps://github.com/wevm/mppx/releases/tag/mppx@0.4.11Release Notes
security-advisories@github.comhttps://github.com/wevm/mppx/security/advisories/GHSA-mv9j-8jvg-j8mrPatch, Vendor Advisory
Impacted products
Vendor Product Version
wevm mppx *
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "product": "mppx",
          "vendor": "wevm",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 0.4.11"
            }
          ]
        }
      ],
      "source": "security-advisories@github.com"
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:wevm:mppx:*:*:*:*:*:node.js:*:*",
              "matchCriteriaId": "72D62258-34DE-453F-8DFC-D25FA285D537",
              "versionEndExcluding": "0.4.11",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "mppx is a TypeScript interface for machine payments protocol. Prior to version 0.4.11, the tempo/session cooperative close handler validated the close voucher amount using \"\u003c\" instead of \"\u003c=\" against the on-chain settled amount. An attacker could submit a close voucher exactly equal to the settled amount, which would be accepted without committing any new funds, effectively closing or griefing the channel for free. This issue has been patched in version 0.4.11."
    },
    {
      "lang": "es",
      "value": "mppx es una interfaz TypeScript para el protocolo de pagos de m\u00e1quinas. Antes de la versi\u00f3n 0.4.11, el gestor de cierre cooperativo tempo/sesi\u00f3n validaba el monto del vale de cierre usando \u0027\u003c\u0027 en lugar de \u0027\u003c=\u0027 contra el monto liquidado en cadena. Un atacante podr\u00eda enviar un vale de cierre exactamente igual al monto liquidado, el cual ser\u00eda aceptado sin comprometer nuevos fondos, cerrando o griefing efectivamente el canal de forma gratuita. Este problema ha sido parcheado en la versi\u00f3n 0.4.11."
    }
  ],
  "id": "CVE-2026-34209",
  "lastModified": "2026-07-24T21:10:00.143",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "NONE",
          "baseScore": 7.5,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "NONE",
          "integrityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N",
          "version": "3.1"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 3.6,
        "source": "security-advisories@github.com",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-34209",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "yes"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-04-02T15:13:21.208040Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2026-03-31T15:16:18.030",
  "references": [
    {
      "source": "security-advisories@github.com",
      "tags": [
        "Patch"
      ],
      "url": "https://github.com/wevm/mppx/commit/94088246ee18f21b5d6be40d9e7a464f5a280bfb"
    },
    {
      "source": "security-advisories@github.com",
      "tags": [
        "Release Notes"
      ],
      "url": "https://github.com/wevm/mppx/releases/tag/mppx@0.4.11"
    },
    {
      "source": "security-advisories@github.com",
      "tags": [
        "Patch",
        "Vendor Advisory"
      ],
      "url": "https://github.com/wevm/mppx/security/advisories/GHSA-mv9j-8jvg-j8mr"
    }
  ],
  "sourceIdentifier": "security-advisories@github.com",
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-294"
        }
      ],
      "source": "security-advisories@github.com",
      "type": "Secondary"
    }
  ]
}



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